Most American children go to state schools, but the private schools ______ be very good.
-----Are you a journalist?-----No, but I _______.
_______ the U.S.-China relationship as “the most consequential(重要的)” in the world, U.S. Secretary of State John Kerry called for greater cooperation between the two powers.
Seeing his father’s angry expression on his face, Andy _______ the conversation from one subject to another.
If you are to take up the challenge of ice bucket, _______.
_______ in ancient times, the book is still welcomed by lots of readers today.